Shinohara Burn Site Remediation
Client: CalRecycle
Contract Value: $2,200,000
Contract Value: $2,200,000
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Key Features:
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AIS was contracted to remediate contamination from a 17-acre historical burn landfill site by containing and capping contaminated soil. Work was performed under the jurisdiction of the Army Corps of Engineers, the City of Chula Vista, Cal EPA, California Department of Fish and Wildlife, and Cal Recycle.
Approximately 35,000 CY of burn ash debris was relocated away from the active Otay river. Exposed material found along the slopes adjacent to the river was removed using bucket of an excavator located at the edge of the upland terrace above the slope. The slopes adjacent to the river were contoured to an approximate 3:1 ratio, and the terrace was contoured to assure appropriate drainage post-remediation.
Imported crushed rock was mixed with native material and placed at the toe of the slope at the river’s edge.
All contaminated material was stockpiled on the upland terrace and covered with a minimum 3-foot cap of imported soil. Over 40,000 CY of soil was imported as cap material to cover burn ash.
Native trees and wetland vegetation along the edge of the project limit of work were protected.
Erosion control fencing was placed at the toe of the slope to ensure that remediation efforts did not result in contaminated soil or imported cap soil entering the Otay River.
AIS installed turf mats on all slopes to act as armoring for Otay River flood conditions.
AIS fine graded the 17-acre site and installed swales and down drains.
Approximately 35,000 CY of burn ash debris was relocated away from the active Otay river. Exposed material found along the slopes adjacent to the river was removed using bucket of an excavator located at the edge of the upland terrace above the slope. The slopes adjacent to the river were contoured to an approximate 3:1 ratio, and the terrace was contoured to assure appropriate drainage post-remediation.
Imported crushed rock was mixed with native material and placed at the toe of the slope at the river’s edge.
All contaminated material was stockpiled on the upland terrace and covered with a minimum 3-foot cap of imported soil. Over 40,000 CY of soil was imported as cap material to cover burn ash.
Native trees and wetland vegetation along the edge of the project limit of work were protected.
Erosion control fencing was placed at the toe of the slope to ensure that remediation efforts did not result in contaminated soil or imported cap soil entering the Otay River.
AIS installed turf mats on all slopes to act as armoring for Otay River flood conditions.
AIS fine graded the 17-acre site and installed swales and down drains.